Display Select Panel
The display select panel, located on the left and right forward panels, controls the displays
on the inboard, outboard and lower DUs. Normal operation is all selectors in the NORMAL
position. The pilots’ outboard and inboard DUs display primary flight and navigation data
and the upper DU displays engine data.
If a DU fails, automatic display switching ensures critical information remains available to the
pilots at all times. If the system detects an operational failure on an outboard DU, the
compact EFIS format automatically moves to the inboard DU and the failed outboard DU
blanks. If the system detects a failure on an inboard DU, the compact EFIS format
automatically moves to the outboard DU and the failed inboard DU blanks. If the upper DU
fails, the engine display automatically moves to the lower DU.
Note: There is no automatic switching for a lower DU failure.
Manual control of display formats is provided for undetected failures. The outboard rotary
switch on the display select panel controls the formats displayed on either the outboard or
inboard DUs. The inboard rotary switch controls the display format shown on the lower DU.
